bug 139

R=r
OCL=27987
CL=27987

src/cmd/6g/cgen.c

@@ -632,6 +632,7 @@ bgen(Node *n, int true, Prog *to)
 
 	switch(n->op) {
 	default:
+	def:
 		regalloc(&n1, n->type, N);
 		cgen(n, &n1);
 		nodconst(&n2, n->type, 0);
@@ -644,12 +645,14 @@ bgen(Node *n, int true, Prog *to)
 		goto ret;
 
 	case OLITERAL:
-// need to ask if it is bool?
+		// need to ask if it is bool?
 		if(!true == !n->val.u.bval)
 			patch(gbranch(AJMP, T), to);
 		goto ret;
 
 	case ONAME:
+		if(n->addable == 0)
+			goto def;
 		nodconst(&n1, n->type, 0);
 		gins(optoas(OCMP, n->type), n, &n1);
 		a = AJNE;

test/golden.out

@@ -106,11 +106,6 @@ BUG: compilation succeeds incorrectly
 =========== bugs/bug136.go
 BUG: should not compile
 
-=========== bugs/bug139.go
-bugs/bug139.go:7: fatal error: naddr: ONAME class x 5
-
-BUG should compile
-
 =========== bugs/bug140.go
 bugs/bug140.go:6: syntax error near L1
 bugs/bug140.go:7: syntax error near L2